US3216948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic pigments made from organic dyes and ion exchange resins and methods for making same
Assignee: Individual
•
Filing: 1961-10-13
•
Granted: 1965-11-09
•
Expires: 1981-10-13
Abstract
No abstract record available.
Inventors
- 👤 Edward M Redding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:55
CPC Classifications
C; C09; C09B; C09B63/00; B; B01; B01J; B01J47/00; B01J47/10; C09B69/00; C09B69/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
THE METHOD OF FORMING A SUBSTANTIALLY INSOLUBLE ORGANIC PIGMENT WHICH COMPRISES REACTING A DYE SALT SELECTED FROM THE GROUP CONSISTING OF CATIONIC AND ANIONIC ORGANIC DYE SALTS DISSOLVED IN A POLAR SOLVENT WITH SUSPENDED FINELY DIVIDED INSOLUBLE SYNTHETIC ORGANIC ION EXCHANGE RESIN PARTICLES OF LESS THAN 10 MICRONS IN DIAMETER HAVING A POLARITY OPPOSITE THAT OF THE DYE SALT TO THE EXTENT OF AT LEAST 5 PARTS DYE BY WEIGHT PER 95 PARTS BY WEIGHT OF DRY RESIN, AND RECOVERING THE RESULTING PIGMENT PARTICLES HAVING THE INSOLUBILITY CHARACTERISTICS OF THE ION EXCHANGE MATERIAL AND THE COLOR PROPERTIES OF THE ORIGINAL IONIZED DYE SALT
Claim 2
Independent Claim
93 words
THE METHOD OF FORMING A SUBSTANTIALLY INSOLUBLE FLUORESCENT ORGANIC PIGMENT WHICH COMPRISES REACTING AN IONIZABLE FLUORESCENT ORGANIC DYE SALT DISSOLVED IN A POLAR SOLVENT WITH SUSPENDED FINELY DIVIDED INSOLUBLE SYNTHETIC ION EXCHANGE PARTICLES OF LESS THAN TEN MICRONS IN DIAMETER HAVING A POLARITY OPPOSITE THAT OF THE DYE SALT TO THE EXTENT OF AT LEAST 5.0 PARTS OF DYE TO 95.0 PARTS BY WEIGHT OF DRY RESIN, AND RECOVERING THE RESULTING PIGMENT PARTICLES HAVING THE INSOLUBILITY CHARACTERISTICS OF THE ION EXCHANGE MATERIAL AND SUBSTANTIALLY THE FLUORESCENCE PROPERTIES OF THE ORIGINAL IONIZED DYE SALT.
References Cited (Backward Citations)
US2778798A
Cited
US2938873A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |